Shedding mechanism for looms.



Patented sept. I6, |902.

' e. w. STAFFORD. l

SHEDDING MECHANISM FOB LOMS.

(Application filed Jain. 2, 1902.) v

2 Shees-Siheet I.

. `(llo` Model.)

www. N

mw M zaameasg,

- Vmt 709,455. Patented sept. ls, |902.

\ G. w. sTAFronn. t 4

SHEDDING MECI'IANISMv FOB LDOMS.

(Application 1e`d Jan. 2, 1902.)

2 sheets-sheet "2.

(No Model.)

GEoRGE vv; SST-AEE eEo. wsTAEEoRnCOMPANY, oElgREA T1 N o NEWfvoRKg i oncemt:

GEORGE W; STAFFORD,`

A the; countyot` Kent, State ofY T i ave injventeda certainnew" and usefullmprovenienti in Sheddingllechansms for Looms, ofr'hich the following is a 'the accompanying drawings A `The]invention relates Vo double acting open-shed` shedding` mechanisms `or (lobbies forlooms.` `l `H The main objects of the .invention are to ob? `viateiu` the case of shedding mechanisms or dobbies of the class named and of the general construction"` now" `in i common and ex-` tensive use a largepartof the laborand strain `heretofore.devolving upon `the lifters and the i operating mechanism therefor' in eecting the movementsof the harness-frames, thereby `reducing considerably the amount ofpower which `is consumed in the actuation of the sheddingr mechanism `or dobby and reducing i considerably the wear and tear of the various `Workingparts which are com prisedwithin the l1ead`thereof. l f l t t The inventioncousists, esseiitially, inthe combination, withtheharn ess-levers or equivaient devices employedfor transmitting to the harness-f rames the `movements which are derived from` the,` actuation lof` `the hooksor hooked jacks, by the knives or litters, of h'oldf ing-hooks Whichoperateunder control of theV pattern devices and actwheneverit is neces-` sary thatthe respectiveharn ess-frames should `beelevated for two or more picks in succes- `lsion to hold said harness-levers orother transmitters in position `tolkeep the corresponding specification, reference be'inghad therein `to harness-,frames elevated until the depression of saidharness-"framesl is required in the order "ofshedding, `Heretofore.in dobbies as ordibeen necessary to keep a harness-frame ele! `vated `formo-re than onepickthishas been effectedby causing` thev `hooks or `hooked jackspwhichare pi-voted to the opposite ends of the lever connection or connector of the `harnesslever pertaining to such harnesslnarily constructed and operated when it has `gframe,` to engage alternately with the respec- RnfoFf-WARWICK, RHODE ISLAND." Assiettes To `THE Y DvtLLE, MAssAcHUsETTs, A coR.- t i rs1-i :onlne y MECHAN i SAM `Foe` Loo M s.` i

cIErcATroN f ming part ,of Letters" raten Nal'roeAsadated september l1 6; `1902. r

" i Application iiledJauuaryZ,1902.` Serialllmil4t).` (No model.)` i

` tive litters feras many 'outgoingmovements `5c of the` litters as correspond with the number of picks for which theA harness-frame.should remainelevated. This throws ateverypick ating mechanism for the litters theburden of'sustaining the strain ot every` harnessframe which requires to be elevated orto remain elevated, and in consequence notV only consumes a proportionately great amount of 6o power in the actuation `ot" the lifter-shut occasions arcorresponding amount ot' wearof allthe'movinglparts. A

.l have illustrated my invention inthe accompanying:r drawings,` in, which 65 Figurel shows `in side elevation" an embodimentof the invention. Fig. 2 shows the same in plan. Fig. 3 shows diderent views of one of the needles.

I will first refer briefly to the usual main 7o features ofthe (lobby, which is illustrated in the drawings, and afterward willl more par-` ticularly explain the invention and its application. t

The framngis designated Ct.`` The two lit't- `75 l One of the rockers withwhich the lifters are .Sey

con nected is shown at d, it being,r fixed upon the rock-shaft c, Whchl extends through to the `other side 'ot' the dobbyand `there has fast thereon the opposite rocker, `(shown at d.)

Theusualrodsff are employed for connect- 85 ments of my present `invention the said har-` 95 ness-levers` may be replaced by some other suitable transmitters having proper `connec-` tion with the harness-f rames. The lever conver connectionsor connectors, and the oper- 5,5` p

ne'ction It' is pivoted, as usual, to the harnesslever at k", and at c i are represented the usual 7 hooks or hooked jacks," which are connected vcoperate with the litters.` v vAt 7c 7c are shown the back-'rests or y `Yagainstl whichthe extremities of the lever con-V i with the opposite extremities of the said lelver conne'ctionfol1 connector and arranged to girths,

nectionsor vconnectors take bearing at the'inlnerextremesol" their movements., `A patterncylinder-is shown atm, portion of a pattern# chain ratn, and indicator pegs' or pins car- `f Iriedbysaid pattern-chain .are designated 0. Pattern-fingers' pp', arranged to, be Iacted .ISV

- f `atp'. y The inner ends of the pattern-fingers,

againstby the said pegs or pins, are pivoted '-which .cooperate with the lower hooks kor fhookedjacks t" in. thel illustrated construction of dobby, act-directly-against the .under surfaces ofv the, said *hooks or hooked jacks,

' although this s'not material, whil'eneedlesq are interposed' between the upper hooks orl Vhooked jacks 't' and the inner ends of the pattern-fingers which cooperate with the said up- The gratings,`

per hooks'lo'r hooked jacks.

- which position and guide the hooks or hooked at rr',

`Incarrying my invention into eiiect Icom'-l bineA with the harness-.lever g 'or other transmitter a, holding-hook, which is represented 'herein at s.

Thesaid holding-hook preferj" l ably is connected withthe said harness-lever,

as by pivotingthe samerthereto. It is represented as pivotedto the said harness-lever at a point that is adjacent to the point of pivotal attachment of the lever connection or connector h to the said harness-lever.

At i is shown a holding-bar, preferably sta- -tionary,an"din any event arranged to sustain -the harness-frame in elevated position without communicatingstraintothelifters. With the said holding-bar the holding-hook s is caused to engage for the purpose of retaining in its elevated position the harness-frame,

.which is connected withfthe harness-lever g. 'The' holding-hook when caused` to engage with the holdingbar .retains theV harnessframe inthe said elevated position, relieving ,the lifters, hooks or hooked jacks 'i i', and lever connection 72. ofthe continuousstrain to which the said parts usually are subjected. The said holding-hook .s is placed nnder'ycon- "trol of the pattern devices for the .purpose of occasion-ing the engagement of the same with theholding-bar at the proper times. beseparately controlled, if desired; but in order to avoid any-increase in the number of pattern-fingers and needles it is. preferred to control-the same by means of the same pattern-finger p and needle q. which .serve for the upper hook or hooked jacke'.

Thus the said needleq is furnished `with arestor .y such holding-hook sufticientlyto cause it to' clear the holdin g-bar when needle g is raised. v

shoulder atq','which projects underthe holdinghook .s and is adapted to engage and lift,

jacks it" and pattern-fingerspp, are'indicated It may` .When theharness-lever g occupies the posi-l tion thereof which places in itselevated position the harness-frame whichtis connectedL therewith'and so long as lh'oldinghooks remains in engagement with holding-bar t,

tothe harness-leverwithout alecting the position ofthe said harness-lever. `Thisprovidesl j for the action of the parts, which facilitates the lever connection h may move freely about the-pointer' pivotal attachment-ot' the same the Vlowering of the said Vharness-'frame at the f.

desiredtime. 4.In order'toavoidsh'ock'andv possible .injuryto the sheddingy mechanism or `warp-threads, it isfnecessary that lthe descent ofa `harness-frame from its.` elevated .position should always be caused to take place f underfthe control oft the particular Vlifter Y which-"atV the predetermined `time for such descent is making its ingoing movement.- .To

this end while holding-hooksremains in engagement with holding-bar t the lever con` nection'pertainingto the harness-lever, which thereby is maintained in its outer position, 1s caused to swing or rock upon its point of pivotal connection with the said 'harness-lever in unison with the movements of thelifters,

causing the opposite'kextremities thereof to.

take bearing alternately againsty the corresponding back-rests 7a k and also causing itsv hooks or hooked jacks toaccompany idly the litters in the movements of the latter. This Vmaintains the parts Vin proper working relations, and if now at .the outward extreme of the outgoingmovement of either lifter the holding-hook' is disengaged from the holdingbar` the hook or hooked jack corresponding w-ith thesaid lifter will engage the latter, the opposite end of the lever connection being at this time .in contact with the corresponding back-rest, so that the inward movement of the said harness-lever and descent of the IOO connected harness -frame will be caused to` take place smoothly and Without shock at a 4rate ot" speed which isy proportioned to the speed with which the lifter itself. moves inward.;v For the purpose of causing the lever connection thus to rock` r,or swing and the hooks or hooked jacks to accompany the respective lifters in' the movements of the latter, as just referred to, while theharness-lever remains ,locked in its outer position with thev harness-frame elevated, various means may be employed. In order, however, to

'avoid an increase in the number of parts, I

which occupy a lowered position, and com-v IIO inunicates thereto a sufficient arnon nt of outward movement to easethe holdof the` correj .fsponding holding-hooks upon `the holdingbar,` This facilitates the disengagement of the said holding-hook from the said holdingbarby the action of the pattern devices.

In order 1o permit the outer extremity ot' the holding-hook to rest,normallynpon the i top of .the holding-barand be supported thereby, relieving the needle q and .corre.

sponding pattern-finger of the weightot' such hook,the said: holding-hook is formed with an upward bend at gli. In theposition ol the holding-hook corresponding with the inner or normal position of theharness-lever and depressed position ofthe harness-frame this n p- Ward bend in theneedle is presented at the rest or shoulder gf of the` needle,` thereby causing the holding-.hook to clear the said rest or shoulder. Vhen, however, the harness-lever ismoved outward, so as to raise the harness-frame, the endwise movement of the holding-hook outward presents aditfer-` ent portion ot' the said hook to the said rest` or shoulder, the said portion taking albearing upon the said rest or shoulder. y

I claim as myinventjon-A l. In a double-acting shedding mechanism` or (lobby forlooms, in combination, `the transmitter, the lever connection connected with the said transmitter, the hooks or `hooked jacks `connected with the opposite extremities of the said lever connection,` the liftersactin.;`

` alternately, the pattern devices controlling the engagement of said hooks or hooked jacks With said litters, and the holdinghook acting under`control of the said pattern devices t-o c retain the said transmitter-in position to keep the corresponding harnessframe elevated, substantially as described. e 4 v 2. In a doublefacting shedding mechanism or dobby for looms, in combination, the transmitter, the lever y. connection connected with thesaid transmitter,thehooksorhookedjacks connected With the opposite extremities ot'` the said `lever connection, the litters acting alternately, the pattern devices controlling e 4the engagement of said hooks or hooked jacks with said litters, lthe holding-bar, and the holding-hook carried by the said transmitter e and engaging with the said holding-bar un` corresponding harness-frame elevated, sub

stantially as described.

4f.` In a double-acting shedding mechanism or dobby for looms, in combination, the transmitter,the lever connection pivotedto the said transmitter, the hooks or hooked jacks connected to the opposite extremities of the saidelever connection, the litters acting alternately, the holding-hook whereby said transmitter is retained in position to keep the corresponding harness-frame elevated, and

`the pattern devices including a hook or hooked-jack cont-rolling member which controls also the action of the said holding-hook, substantially as described. i

5. In a double-acting shedding mechanism or dobby for looms, in combination, the transmitter, the lever connection pivoted to the said transmitter, the hooks or hooked jacks connected .to the opposite `extremities of the said lever connection, the litters acting al terna-tely, the pattern devices, including one or more needles, to control the engagement of said `hooks or hooked jacks with the said lifters, and the holdinghookalso controlled by the said needle and acting to retain the said transmitter in position to keep the corresponding harness-'frame elevated, substantiallygas described. f

(. In a double-acting shedding mechanism i or dobby foi-looms, in combination, the transmitter, the lever connection pivoted to the said transmitter, the hooks or hooked jacks connected to the opposite extremities of the `said lever-connection, the lifters acting alyternately, the holding-hook connected With said transmitter and serving to retain the corresponding harness-frame in elevated position, and the pattern devices, including a jack-controlling needle which also controls the action of said holding-hook, substantially as described. e'

7. In a double-acting shedding mechanism `or dobbyfor looms, in combination, the transmitter, the lever connection pivoted to the said transmitter, the hooks or hooked jacks connected to the opposite extremities of the IOO said lever-connection, the lifters acting alternately, the holding-bar, the holding-hook connected with said transmitter, servin'gto retain the corresponding harness-fran1e in elevated position, constructed to rest on said holding-bar while said harness-frame occupies a depressed position, and anupWardl bend as described to clear the controlling-needle, and the pattern devices, inclndinga jack-controlling needle Which also controls the action of said holding-hook, substantially as described.-

In testimony whereof I affix my signature in presence oftwo Witnesses.

GEORGE W. STAFFORD. Witnesses:

OHAs. F. RANDALL,

WILLIAM A. COPELAND.

IZO 

